I had a legit game against the computer-IMPOSSIBLE that lasted at least 485 moves [i think i lost], it was a fortress position for most of the game, unfortunately i don't think the site saves games beyond a set number of moves (somewhere around 200). or at least it didn't save the game at the time.

The most I have seen in a OTB tournament game was 321 moves, played by one of my opponents [it was a FIDE event and he had all the moves written down on 6 scoresheets].

On move 7, had the computer played 7. Na3, it appears that the queen would have had an escape route along the a7-e3 diagonal, while still simultaneously protecting against the spectre of black's knight fork on c2.

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